Fossilized ammonite half which reveals the internal chambers lined with calcite crystals. The ammonite has been naturally replaced by calcite with...

Fossilized ammonite half which reveals the internal chambers lined with calcite crystals. The ammonite has been naturally replaced by calcite with...

Fossilized ammonite halves which reveals the internal chambers lined with calcite crystals. The ammonite has been naturally replaced by calcite wi...

This genuine pre-historic shark tooth makes a perfect gift for any collector. Preserved fossil tooth in matrix of the extinct mackerel shark, Otod...

The fossilized shells of Ammonites are typically spiral-shaped, very much like that of the Nautilus. However, around 170 million years ago, these s...

Fossilized ammonite half which reveals the internal chambers lined with calcite crystals. The ammonite has been naturally replaced by calcite with...

Genuine Megalodon tooth in a Glass Display Box. This specimen comes in a labeled display box with color image and a brief written description. Thes...

Fossilized psuedomorph of calcite after ammonite halve to reveal the internal chambers lined with calcite crystals. The ammonite has been internall...

A beautiful, fossilized and calcified ammonite shell with an iridescent, opalized shimmer, displaying hints of vibrant yellow tones. This specimen ...

Fossilized psuedomorph of calcite after ammonite halve to reveal the internal chambers lined with calcite crystals. The ammonite has been internall...

Fossilized pseudomorph of calcite after ammonite halve to reveal the internal chambers lined with calcite crystals. The ammonite has been internall...

Fossilized psuedomorph of calcite after ammonite halve to reveal the internal chambers lined with calcite crystals. The ammonite has been internall...

Fossilized psuedomorph of calcite after ammonite halve to reveal the internal chambers lined with calcite crystals. The ammonite has been internall...

Fossilized psuedomorph of calcite after ammonite halve to reveal the internal chambers lined with calcite crystals. The ammonite has been internall...

Ptychopariida is a large, heterogeneous order of trilobite containing some of the most primitive species known. The earliest species occurred in th...

Brittle stars, or ophiuroids, are echinoderms in the class Ophiuroidea, closely related to starfish. They crawl across the sea floor using their fl...

Acanthopyge is an extinct genus of lichid trilobite that lived during the Devonian. This is a very nice, 1" long lichid (Acanthopyge) trilobite fro...

Natural its original fossil matrix. The Asaphid trilobites include some of the most extreme trilobite adaptations known, and the group produced som...

Ptychopariida is a large, heterogeneous order of trilobite containing some of the most primitive species known. The earliest species occurred in th...

Ptychopariida is a large, heterogeneous order of trilobite containing some of the most primitive species known. The earliest species occurred in th...

Brittle stars, or ophiuroids, are echinoderms in the class Ophiuroidea, closely related to starfish. They crawl across the sea floor using their fl...

Brittle stars, or ophiuroids, are echinoderms in the class Ophiuroidea, closely related to starfish. They crawl across the sea floor using their fl...

Ptychopariida is a large, heterogeneous order of trilobite containing some of the most primitive species known. The earliest species occurred in th...

An ineradicable, large Crotalocephalina gibba, Crotalocephalina trilobite is an extinct genus of trilobite in the order Phacopida found in Morocco....